Question

A 10 kg rock falls 5 meters and hits the ground. Did the rock have any energy just

before it hit the ground? If so, how much? What force did it require, to get the rock to start
moving?

Answer 1

495.5 Joules

Step-by-step explanation:

Given data

Mass= 10kg

Height= 5meters

g= 9.81m/s^2

Yes the rock will possess potential energy before it hits the ground

The potential energy is expressed as

PE=mgh

substitute

PE= 10*9.91*5

PE= 495.5 Joules